PDF_rotate

(PHP 4, PECL pdflib >= 1.0.0)

PDF_rotate — Rotate coordinate system

说明

PDF_rotate ( resource $p , float $phi ) : bool

Rotates the coordinate system. 成功时返回 TRUE，或者在失败时返回 FALSE。

User Contributed Notes

notrub225 at yahoo dot com 11-Feb-2008 08:29


Many of the functions used in the post below are deprecated. Here is the modern Object Oriented version that is almost the same line by line and uses the PDFlib() class:



<?php

    $pdf = new PDFlib();

    $pdf->begin_document("","");

    $pdf->set_info("Creator","images.php");

    $pdf->set_info("Title","Horizontal and Vertical Example");

    // Width of 612, and length of 792 make US Letter Size

    // Dimensions are reversed for Landscape Mode

    $pdf->begin_page_ext(792,612,'');



    $font = $pdf->load_font("Helvetica-Oblique", "iso8859-1", "");

    $pdf->setfont($font, 18);

    $pdf->show_xy("This is horizontal text",50, 300);

    $pdf->rotate(90); /* rotate coordinates */

    $pdf->show_xy("vertical text",300, -400);

   

    $pdf->rotate(-90); /* rotate coordinates */;

    $pdf->show_xy("This is horizontal text",50, 400);



    $pdf->end_page_ext("");

    $pdf->end_document("");

    $buf = $pdf->get_buffer();

    $len = strlen($buf);

    Header("Content-type: application/pdf");

    Header("Content-Length: $len");

    Header("Content-Disposition: inline; filename=images.pdf");

    echo $buf;

    $pdf->delete();

?>

gman at speakeasy dot net 30-Jan-2003 06:17


Thanks for your help, this is a clean working example ...

<?php

    $pdf = pdf_new();

    pdf_open_file($pdf);

    pdf_set_info($pdf,"Creator","images.php");

    pdf_set_info($pdf,"Title","Horizontal and Vertical Example");

    // Width of 612, and length of 792 make US Letter Size

    // Dimensions are reversed for Landscape Mode

    pdf_begin_page($pdf,792,612);



    pdf_set_font($pdf, "Helvetica-Oblique", 18, "host");

    pdf_show_xy($pdf, "This is horizontal text",50, 300);

    pdf_rotate($pdf, 90); /* rotate coordinates */

    pdf_show_xy($pdf,"vertical text",300, -400);

    

    pdf_rotate($pdf, -90); /* rotate coordinates */;

    pdf_show_xy($pdf, "This is horizontal text",50, 400);



    pdf_end_page($pdf);

    pdf_close($pdf);

    $buf = pdf_get_buffer($pdf);

    $len = strlen($buf);

    Header("Content-type: application/pdf");

    Header("Content-Length: $len");

    Header("Content-Disposition: inline; filename=images.pdf");

    echo $buf;

    pdf_delete($pdf);

?>

bml137 at myglo dot net 27-Jan-2003 11:11


When you rotate, remember that you are rotating the coordinate system.  So if you are rotating 90 degrees with the origin at (0,0) (bottom-left corner on PDFs) in the clockwise direction, then the pivot appears to be on the top-left of the PDF.  For instance, if you put a sheet of paper on the table in vertical position, then rotate it clockwise 90 degrees by pivoting from the bottom-left corner, the pivot (or origin) will now be in the top-left corner of the horizontal paper.  As you can see, you now have room show text in the +x, -y directions, not +x, +y.